Spring for vehicles.



P. L. MARTENETTE.

SPRING FOR VEHICLES.

APPLICATION FILED DEC. 16, 1912 Patented July 28, 1914.

FRANCIS L. MARTENETTE, OF CHICO, CALIFORNIA.

SPRING FOR VEHICLES.

Specification of Letters Patent.

Patented July 28, 1914.

Application filed December 16, 1912. Serial No. 737,068.

To all whom it may concern Be it known that I, FRANCIS L. MAnrn- NETTE,a citizen of the United States, residing at Chico, in the county ofButte and State of California, have invented certain new and usefulImprovements in Springs for Vehicles, of which the followingis aspecification.

My invention relates to springs and particularly to an elliptic springto be used on vehicles.

The object of the invention is to provide a spring of a novel character,which will possess unusual quickness to recover from stress or shocks,great resiliency and less liability of breaking.

Referring to the drawing forming a portion of this specification, theview illustrates a side elevation of my improved spring.

Referring more particularly to the drawing, the numeral 1 designates themain or master leaves of the spring, which converge and are connected attheir ends in the usual manner, as at 2. The master leaves 1 areextremely thin in the center of the spring, as at 3, and increase inthickness as they approach the ends. Mounted upon the master leaves 1and secured by the usual securing members l, is a plurality of leaves 5formed preferably from thin metal similar to that used for heavy clocksprings and of uniform thickness throughout their lengths. Mounted onthese thin leaves are exterior leaves 7 of greater thickness than theleaves 5 and secured to the other leaves by bolts 8. The spring may besecured in place upon the vehicle in any desired manner; notillustrated, as having no bearing on this invention.

I-Ieretofore it has been the practice to form the master leaves of thisclass of springs either of uniform thickness throughout their lengths orstill more frequently, quite thick in the center of the springs andbecoming much smaller toward the ends. By the construction of thisinvention, it is obvious that a great degree of resiliency is obtainedand that the spring is less liable to break s the strain is more evenlydistributed throughout its length. Where the master leaves are thinnest,there is a larger number of the leaves 5 than near the ends where themaster spring is the thickest, thus making the resiliency of the springuniform.

Having thus described my invention what I claim is:

1. A spring for vehicles comprising a master leaf relatively thin at itscenter, a plurality of thin flat leaves mounted on said master leaf, andan exterior leaf of greater thickness mounted on said flat leaves.

2. A spring for vehicles comprising a master leaf relatively thin at itscenter, a plurality of thin fiat leaves of graduated lengths mounted onsaid master leaf and an exterior leaf of greater thickness mounted onthe shortest of said. flat leaves.

3. In a spring for vehicles, a pair of leaves connected at their endsand spaced apart at their centers, said leaves being thinnest at theircentral portions and increasing in thickness toward their ends, and aplurality of auxiliary leaves secured upon and exteriorly of said firstmentioned leaves, said auxiliary leaves being of extreme and uniformthlnness and of graduated lengths, and relatively short leaves ofgreater thickness mounted on said auxiliary leaves.

4. A spring for vehicles comprising leaves connected at their ends andspaced apart at their central portions, said leaves being thickest attheir point of connection with each other and decreasing in thicknesstoward their centers, a plurality of auxiliary leaves connected withsaid first named leaves, said auxiliary leaves decreasing in length toform a stepped formation upon the first named leaves and being ofextreme and uniform thinness, and exterior leaves of greater thicknessbut less length than said auxiliary leaves.

In testimony whereof I hereto affix my signature in the presence of twowitnesses.

FRANCIS L. MARTENETTE.

Witnesses:

ARA B. SALIsBURY, JAKE SILBERSTEIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

. Washington, D. 0."

